package com.zsh.rabbitmq.springbootrabbitmq.config;

import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.CustomExchange;
import org.springframework.amqp.core.Queue;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.HashMap;
import java.util.Map;

/**
 * @author zsh
 * @Description 延时队列配置类
 * @create 2022-05-06 18:52
 */
@Configuration
public class DelayedQueueConfig {

    //交换机
    public static final String DELAYED_EXCHANGE = "delayed.exchange";
    //队列
    public static final String DELAYED_QUEUE = "delayed.queue";
    //routingKey
    public static final String DELAYED_ROUTING_KEY = "delayed.routingKey";

    //声明交换机
    @Bean
    public CustomExchange delayedExchange(){

        Map<String, Object> arguments = new HashMap<>();
        arguments.put("x-delayed-type","direct");

        /**
         * 参数解释
         * 1.交换机名称
         * 2.交换机类型
         * 3.是否需要持久化
         * 4.是否自动删除
         * 5.其他参数
         */
        return new CustomExchange(DELAYED_EXCHANGE,"x-delayed-message"
                ,true,false,arguments);
    }

    //声明队列
    @Bean
    public Queue delayedQueue(){
        return new Queue(DELAYED_QUEUE);
    }

    //绑定
    @Bean
    public Binding delayedQueueBindingDelayedExchange(
            @Qualifier("delayedQueue") Queue delayedQueue,
            @Qualifier("delayedExchange") CustomExchange delayedExchange){

        return BindingBuilder.bind(delayedQueue).to(delayedExchange).with(DELAYED_ROUTING_KEY).noargs();

    }




}
